I've had dish network for 8-9 years no problems. Went to bed last night everything worked fine, this morning no signal at all. I have a dish 500 with 2 receivers, no signal on either receiver. I've checked all cables, everything looks good. Tried re-pointing the dish, nothing. I'm getting no switch box detected from both receivers. I'm thinking bad lbn. Does this sound right? Anything else it could be? Thanks.